[amfphp] Patch to lookup server name in ServiceBrowser

[Rick W. <vc...@de...>]

This patch replaces the hard coded 'localhost' with the actual name of 
the server as defined by $_SERVER['SERVER_NAME'] in the AS code 
generated by the ServiceBrowser.

This requires changes in browser/tpl/as_1_template.txt, 
browser/tpl/astemplate.txt and util/ServiceBrowser.php to add an 
additional template value. (%servername%)